Add light color helpers

sass/base/_all.sass

@@ -2,4 +2,3 @@
 
 @import "minireset.sass"
 @import "generic.sass"
-@import "helpers.sass"

sass/helpers/color.sass

@@ -8,6 +8,27 @@
       color: bulmaDarken($color, 10%) !important
   .has-background-#{$name}
     background-color: $color !important
+  @if length($pair) >= 4
+    $color-light: nth($pair, 3)
+    $color-dark: nth($pair, 4)
+    // Light
+    .has-text-#{$name}-light
+      color: $color-light !important
+    a.has-text-#{$name}-light
+      &:hover,
+      &:focus
+        color: bulmaDarken($color-light, 10%) !important
+    .has-background-#{$name}-light
+      background-color: $color-light !important
+    // Dark
+    .has-text-#{$name}-dark
+      color: $color-dark !important
+    a.has-text-#{$name}-dark
+      &:hover,
+      &:focus
+        color: bulmaLighten($color-dark, 10%) !important
+    .has-background-#{$name}-dark
+      background-color: $color-dark !important
 
 @each $name, $shade in $shades
   .has-text-#{$name}

sass/utilities/functions.sass

@@ -108,3 +108,8 @@
   @if type-of($color) != 'color'
     @return $color
   @return darken($color, $amount)
+
+@function bulmaLighten($color, $amount)
+  @if type-of($color) != 'color'
+    @return $color
+  @return lighten($color, $amount)